ADS1131 18-Bit, 80SPS, 1-Ch Delta-Sigma ADC w/ Powerdown Switch for Resistive Bridge Sensors & Weigh Scales | TI.com

ADS1131
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18-Bit, 80SPS, 1-Ch Delta-Sigma ADC w/ Powerdown Switch for Resistive Bridge Sensors & Weigh Scales

18-Bit, 80SPS, 1-Ch Delta-Sigma ADC w/ Powerdown Switch for Resistive Bridge Sensors & Weigh Scales - ADS1131
Datasheet
 

Description

The ADS1131 is a precision, 18-bit analog-to-digital converter (ADC). With an onboard, low-noise amplifier, onboard oscillator, precision 18-bit delta-sigma (ΔΣ) ADC, and bridge power switch, the ADS1131 provides a complete front-end solution for bridge sensor applications including weigh scales, strain gauges, and load cells.

The low-noise amplifier has a gain of 64, supporting a full-scale differential input of ±39mV. The ΔΣ ADC has 18-bit effective resolution and is comprised of a third-order modulator and fourth-order digital filter. Two data rates are supported: 10SPS (with both 50Hz and 60Hz rejection) and 80SPS. The ADS1131 can be put into a low-power standby mode or shut off completely in power-down mode.

The ADS1131 is controlled by dedicated pins; there are no digital registers to program. Data are output over an easily-isolated serial interface that connects directly to the MSP430 and other microcontrollers.

The ADS1131 is available in an SO-16 package and is specified from –40°C to +85°C.

Features

  • Complete Front-End for Bridge Sensors
  • Available in an SO Package
  • Internal Amplifier, Gain of 64
  • Internal Oscillator
  • Low-Side Power Switch for Bridge Sensor
  • 18-Bit Noise-Free Resolution
  • Selectable 10SPS or 80SPS Data Rates
  • Simultaneous 50Hz and 60Hz Rejection at 10SPS
  • External Voltage Reference up to 5V for Ratiometric Measurements
  • Simple, Pin-Driven Control
  • Two-Wire Serial Digital Interface
  • Supply Range: 3V to 5.3V
  • –40°C to +85°C Temperature Range

Parametrics

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Part number Order Resolution (Bits) Sample rate (Max) (kSPS) Number of input channels Interface Operating temperature range (C) Package Group Approx. price (US$) Power consumption (Typ) (mW) Package size: mm2:W x L (PKG) Architecture Input type Multi-channel configuration Reference mode Features Input range (Max) (V) Input range (Min) (V) Analog voltage AVDD (Min) (V) Analog voltage AVDD (Max) (V) Digital supply (Min) (V) Digital supply (Max) (V) Rating
ADS1131 Order now 18     0.08     1     SPI     -40 to 85     SOIC | 16     2.10 | 1ku     2.9     16SOIC: 59 mm2: 6 x 9.9 (SOIC | 16)     Delta-Sigma     Differential
Single-Ended    
    Ext     50/60 Hz Rejection
Oscillator
PGA    
0.041     0     3     5.3     3     5.3     Catalog    
ADS1130 Order now 18     0.08     1     SPI     -40 to 85     TSSOP | 16     2.50 | 1ku     2.9     16TSSOP: 22 mm2: 4.4 x 5 (TSSOP | 16)     Delta-Sigma     Differential
Single-Ended    
    Ext     50/60 Hz Rejection
Oscillator
PGA    
0.041     0     2.7     5.3     2.7     5.3     Catalog    
ADS1230 Order now 20     0.08     1     SPI     -40 to 85     TSSOP | 16     2.95 | 1ku     2.9     16TSSOP: 22 mm2: 4.4 x 5 (TSSOP | 16)     Delta-Sigma     Differential
Single-Ended    
    Ext     50/60 Hz Rejection
Oscillator
PGA    
0.039     0     2.7     5.3     2.7     5.3     Catalog    
ADS1231 Order now 24     0.08     1     SPI     -40 to 85     SOIC | 16     2.50 | 1ku     5     16SOIC: 59 mm2: 6 x 9.9 (SOIC | 16)     Delta-Sigma     Differential
Single-Ended    
    Ext     50/60 Hz Rejection
Oscillator
PGA    
0.0195     0     3     5.3     3     5.3     Catalog